RP CRT: Weird Visual Enigma (1 Viewer)

It's probably a similar, but less common occurance like the dread "DLP Rainbow."

See a CRT display is only really illuminating one point of the screen at a time. The phosphores all decay after the electron exposure, and at different rates. Green is also typically driven harder - it's, what, 70% of the signal? - so it may persist longer.

If you had some more light on in the room, it might be harder to see, and if you didn't look for it, it'd be harder to see, too. (But once you start seeing things like this, it becomes difficult to not look for them, I know, I know...)

Leo Kerr

I used to get the same thing with an analog Hitachi rptv I had, and it's been mentionned here before with several other makes. I've yet to see it on my current Sony which I've had for over 3 years. The same sort of eye movement will produce the rainbow effect on dlp sets. Some people have a tiny bit of involuntary small rapid eye movement and will see this effect even when they aren't trying to.